Source mappings are missing for serialized properties

🔎 Search Terms

source map declaration map properties symbols navigation definition goto

🕗 Version & Regression Information

• This is the behavior in every version I tried

⏯ Playground Link

N/A

💻 Code

// api.ts
type ValidateShape<T> = {
  [K in keyof T]: T[K];
};

function test<T>(arg: ValidateShape<T>) {
  function createCaller<T>(arg: T): () => {
    [K in keyof T]: () => T[K];
  } {
    return null as any;
  }
  return {
    createCaller: createCaller(arg),
  };
}

const api = test({
  foo/*target*/: 1,
  bar: "",
});

export const createCaller = api.createCaller;

// main.ts

import { createCaller } from "./api";
const caller = createCaller();
caller.foo/*source*/;

🙁 Actual behavior

Please consider the 2 files above as 2 separate projects.

When those files are in the same project we can successfully go from the source marker to the target marker with "go to definition" and others like it. The same works with project references on.

However, when api.ts gets compiled with declaration maps and consumed through that then this navigation no longer works correctly.

🙂 Expected behavior

I'd expect this navigation to continue to work

Additional information about the issue

No response

Start by reproducing the two-project case using api.ts and main.ts, compiling api.ts with declaration maps and consuming it from main.ts. Trace the source-map and go-to-definition behavior from caller.foo to the foo property, and consider the issue done when navigation reaches the target marker across the generated declarations.